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DnsServer: threadpool thread set to 128. tcp listner backlog count set to 100. Updated forwarder property to resolve domain end point for given forwarders to make it work with quad9 DNS-over-TLS service.

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This commit is contained in:
Shreyas Zare
2018-08-04 12:59:51 +05:30
parent cad321e69f
commit edfb654699
1 changed files with 39 additions and 14 deletions
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53
DnsServerCore/DnsServer.cs
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@@ -76,6 +76,21 @@ namespace DnsServerCore
#region constructor
static DnsServer()
{
//set min threads since the default value is too small
{
int minWorker, minIOC;
ThreadPool.GetMinThreads(out minWorker, out minIOC);
minWorker = 128;
ThreadPool.SetMinThreads(minWorker, minIOC);
}
if (ServicePointManager.DefaultConnectionLimit < 100)
ServicePointManager.DefaultConnectionLimit = 100; //concurrent http request limit required when using DNS-over-HTTPS
}
public DnsServer()
: this(new IPEndPoint(IPAddress.IPv6Any, 53))
{ }
@@ -88,17 +103,6 @@ namespace DnsServerCore
{
_localEP = localEP;
_dnsCache = new DnsCache(_cacheZoneRoot);
//set min threads since the default value is too small
{
int minWorker, minIOC;
ThreadPool.GetMinThreads(out minWorker, out minIOC);
minWorker = Environment.ProcessorCount * 32;
ThreadPool.SetMinThreads(minWorker, minIOC);
}
ServicePointManager.DefaultConnectionLimit = 100; //concurrent http request limit required when using DNS-over-HTTPS
}
#endregion
@@ -466,7 +470,7 @@ namespace DnsServerCore
DnsClientProtocol protocol;
if (_forwarders == null)
protocol = DnsClientProtocol.Udp;
protocol = DnsClient.RecursiveResolveDefaultProtocol;
else
protocol = _forwarderProtocol;
@@ -544,7 +548,7 @@ namespace DnsServerCore
_tcpListener = new Socket(AddressFamily.InterNetworkV6, SocketType.Stream, ProtocolType.Tcp);
_tcpListener.SetSocketOption(SocketOptionLevel.IPv6, SocketOptionName.IPv6Only, false);
_tcpListener.Bind(_localEP);
_tcpListener.Listen(10);
_tcpListener.Listen(100);
//start reading query packets
_udpListenerThread = new Thread(ReadUdpQueryPacketsAsync);
@@ -599,7 +603,28 @@ namespace DnsServerCore
public NameServerAddress[] Forwarders
{
get { return _forwarders; }
set { _forwarders = value; }
set
{
NameServerAddress[] forwarders = value;
if (forwarders != null)
{
foreach (NameServerAddress forwarder in forwarders)
{
if (forwarder.DomainEndPoint == null)
{
try
{
forwarder.RecursiveResolveDomainName(_dnsCache, _proxy, DnsClient.RecursiveResolveDefaultProtocol, _retries);
}
catch
{ }
}
}
}
_forwarders = forwarders;
}
}
public DnsClientProtocol ForwarderProtocol